#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <curses.h>
#include <math.h>
#include <time.h>

struct coin {
	const char *name;
	const char *description;
	struct chart chart;
};

struct chart {
	double *prices;
	size_t length;
};

struct chart new_chart(size_t length)
{
	double *prices = malloc(length * sizeof(double));

	prices[0] = 20;
	for (size_t i = 1; i < length; i++) {
		prices[i] = prices[i - 1] + (rand() % 3 - 1.5);
	}

	return (struct chart) {
		.length = length,
		.prices = prices
	};
}

enum game_state {
	GAME_BEGIN,
	GAME_IDLE,
	GAME_BUY,
	GAME_SELL,
	GAME_END,
};

enum color {
	color_red,
	color_green,
	color_blue,
};

struct button *new_button(char *name, enum color color, size_t width, size_t height)
{
	struct button *button = malloc(sizeof(struct button));
	button->name = name;
	button->width = width;
	button->height = height;
	button->next = NULL;
	button->color = color;
	button->highlighted = false;
	return button;
}

struct game {
	enum game_state state;
	int bank;
	struct coin coin;
	struct button *button;
};

void draw_button(struct button *b, size_t x, size_t y)
{
	draw_box(x, y, b->width, b->height);
	
	if (b->highlighted) {
		attron(A_UNDERLINE);
	}
	
	attron(COLOR_PAIR(b->color));
	
	mvaddstr(y + b->height / 2, x + b->width / 2 - strlen(b->name) / 2, b->name);

	if (b->highlighted) {
		attroff(A_UNDERLINE);
	}

	attroff(COLOR_PAIR(b->color));
}

void draw_chart(struct chart *chart, size_t x, size_t y)
{
	const size_t height = 30;
	const size_t width  = chart->length * 2 + 1;
	
	draw_box(x, y, width, height + 1);

	for (size_t i = 0; i < chart->length; i++) {
		for (size_t j = 0; j < chart->prices[i]; j++) {
			mvaddch(30 - (y + j), x + (i * 2) + 1, '?');
		}
	}

	const size_t button_width = (double)(width) / 3;

	struct button *buy  = new_button("buy",  color_red, button_width, 5);
	struct button *sell = new_button("sell", color_blue, button_width, 5);
	struct button *scam = new_button("scam", color_green, button_width, 5);

	buy->next = sell;
	sell->next = scam;
	scam->next = buy;

	buy->highlighted = true;

	draw_button(buy,  x,  y + height + 1);
	draw_button(sell, x + button_width, y + height + 1);
	draw_button(scam, x + button_width * 2, y + height + 1);
}

enum box_type {
	BOX_TYPE_BUTTON,
	BOX_TYPE_CHART,
	BOX_TYPE_HORIZONTAL,
	BOX_TYPE_VERTICAL,
};

struct box {
	enum box_type type;
	size_t width;
	size_t height;
	enum color color;

	union {
		/* chart */
		struct {
			double *prices;
			size_t length;
		};

		/* button */
		char *name;

		/* horizontal/vertical box */
		struct {
			struct box *children;
			size_t length;
		};
	}
};

void draw_game(struct game *game)
{
	clear();
	mvaddstr(0, 0, game->coin.name);
	mvaddstr(1, 0, game->coin.description);
	draw_chart(&game->coin.chart, 5, 5);
	refresh();
}

struct box *new_chart_box()

struct box *new_container_box(enum box_type type)
{
	struct box *box = malloc(sizeof(box));
	box->width = 0;
	box->height = 0;
	box->type = type;
	box->children = malloc(sizeof(box) * 100);
	box->length = 0;
	return box;
}

struct box *new_vertical_box(void)
{
	return new_container_box(BOX_TYPE_VERTICAL);
}

struct box *new_horizontal_box(void)
{
	return new_container_box(BOX_TYPE_HORIZONTAL);
}

struct box *new

int main(void)
{
	srand(time(NULL));
	initscr();
	start_color();
	init_pair(color_green, COLOR_GREEN, COLOR_BLACK);
	init_pair(color_red,   COLOR_RED,   COLOR_BLACK);
	init_pair(color_blue,  COLOR_BLUE,  COLOR_BLACK);
	cbreak();
	noecho();
	nonl();
	intrflush(stdscr, FALSE);
	keypad(stdscr, TRUE);
	clear();
	refresh();

	struct game game = {
		.state = GAME_BEGIN,
		.bank = 1000,
		.coin = (struct coin) {
			.name = "Bitcoin",
			.description = "A fucking scam.",
			.chart = new_chart(30)
		}
	};

	draw_game(&game);

	refresh();
	
	sleep(300);
	endwin();
}